Clean Water Act discharge permit · NPDES MD0057584
NRG -- WESTLAND FLYASH SITE, Dickerson, MD: NPDES MD0057584 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 47Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
NRG -- WESTLAND FLYASH SITE, held by GenOn MD Ash Management, LLC, holds NPDES permit MD0057584, which discharges to Potomac River Via Unnamed Stream. EPA’s file records it issued September 29, 2016 and expiring October 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | NRG -- WESTLAND FLYASH SITE |
|---|---|
| Permittee as filed | GenOn MD Ash Management, LLC |
| NPDES ID | MD0057584 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 29, 2016 |
| Expiration date | October 31, 2021 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Dickerson, MD 20842 |
| Receiving water | POTOMAC RIVER VIA UNNAMED STREAM |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Limestone Branch-Potomac River (HUC 020700080403) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 48Pollutants on file
- 47Under a numeric limit
- 31With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Cadmium, total [as Cd] | 20 | 10 | 6 | October 31, 2020 | 1,900% over the limit |
| Solids, total suspended | 2 | 14 | 4 | December 31, 2003 | 169% over the limit |
| Selenium, total [as Se] | 20 | 11 | 4 | August 31, 2018 | 16% over the limit |
| pH | 20 | 18 | 2 | May 31, 2018 | |
| Iron, total [as Fe] | 18 | 15 | 2 | December 31, 2003 | 414% over the limit |
| Lead, total [as Pb] | 20 | 8 | 2 | August 31, 2017 | 100% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 24 | 0 | ||
| Sulfate, total [as SO4] | 18 | 12 | 0 | ||
| Nitrite + Nitrate total [as N] | 16 | 10 | 0 | ||
| Chloride [as Cl] | 20 | 9 | 0 | ||
| Copper, total [as Cu] | 20 | 8 | 0 | ||
| Solids, total dissolved | 18 | 8 | 0 | ||
| Barium, total [as Ba] | 16 | 8 | 0 | ||
| Water level at sample collection time | 16 | 8 | 0 | ||
| Nitrogen, total [as N] | 4 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 8 | 0 | ||
| Mercury, total [as Hg] | 18 | 7 | 0 | ||
| Nickel, total [as Ni] | 20 | 6 | 0 | ||
| Phosphorus, total [as P] | 4 | 6 | 0 | ||
| Boron, total [as B] | 18 | 5 | 0 | ||
| Arsenic, total [as As] | 20 | 4 | 0 | ||
| Chromium, total [as Cr] | 18 | 4 | 0 | ||
| Manganese, total [as Mn] | 16 | 4 | 0 | ||
| Silver, total [as Ag] | 16 | 4 | 0 | ||
| Zinc, total [as Zn] | 4 | 4 | 0 | ||
| Antimony, total [as Sb] | 16 | 2 | 0 | ||
| Whole effluent toxicity | 0 | 2 | 0 | ||
| Radium, total | 16 | 1 | 0 | ||
| Nickel, dissolved [as Ni] | 2 | 1 | 0 | ||
| Toxicity, Acute | 1 | 1 | 0 | ||
| Toxicity, Chronic | 1 | 1 | 0 | ||
| Fluoride, total [as F] | 16 | 0 | 0 | ||
| Beryllium, total [as Be] | 16 | 0 | 0 | ||
| Thallium, total [as Tl] | 16 | 0 | 0 | ||
| Aluminum, total [as Al] | 16 | 0 | 0 | ||
| Color [PT-CO units] | 4 | 0 | 0 | ||
| Conductivity | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Arsenic, Inorganic | 2 | 0 | 0 | ||
| Arsenic, dissolved [as As] | 2 | 0 | 0 | ||
| Cadmium, dissolved [as Cd] | 2 | 0 | 0 | ||
| Copper, dissolved [as Cu] | 2 | 0 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 0 | 0 | ||
| Lead, dissolved [as Pb] | 2 | 0 | 0 | ||
| Zinc, dissolved [as Zn] | 2 | 0 | 0 | ||
| Selenium, dissolved [as Se] | 2 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MD0057584.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.